Questions from Applied Statistics

Q: What sources of error might you encounter if you want to know

What sources of error might you encounter if you want to know (a) about the dating habits of college men, so you go to a dorm meeting and ask students how many dates they have had in the last year; (b...

Q: What kind of survey (mail, telephone, interview, web

What kind of survey (mail, telephone, interview, web, direct observation) would you recommend for each of the following purposes, and why? What problems might be encountered? a. To estimate the propo...

Q: What kind of survey (mail, telephone, interview, web

What kind of survey (mail, telephone, interview, web, direct observation) would you recommend that a small laundry and dry cleaning business use for each of the following purposes, and why? a. To est...

Q: (a) Make a stem-and-leaf plot for

(a) Make a stem-and-leaf plot for the number of defects per 100 vehicles for these 32 brands. (b) Make a dot plot of the defects data. (c) Describe these two displays. (Hint: Refer to center, variabil...

Q: (a) The table shows the number of days on the

(a) The table shows the number of days on the market for the 36 recent home sales in the city of Sonando Hills. Construct a frequency distribution and histogram, using nice (round) bin limits. (b) Des...

Q: (a) The table shows raw scores on a state civil

(a) The table shows raw scores on a state civil service exam taken by 24 applicants for positions in law enforcement. Construct a frequency distribution and histogram, using nice (round) bin limits. (...

Q: There is a 70 percent chance that an airline passenger will check

There is a 70 percent chance that an airline passenger will check bags. In the next 16 passengers that check in for their flight at Denver International Airport, find the probability that (a) all will...

Q: For each value of d.f. look up the value

For each value of d.f. look up the value of Student’s t in Appendix D for the stated level of confidence. How close is the t-value to the corresponding z-value (at the bottom of the column for d.f. =...

Q: (a) Make a frequency distribution and histogram (using appropriate

(a) Make a frequency distribution and histogram (using appropriate bins) for these 28 observations on the amount spent for dinner for four in downtown Chicago on Friday night. (b) Repeat the exercise...

Q: (a) Make a frequency distribution and histogram for the monthly

(a) Make a frequency distribution and histogram for the monthly off-campus rent paid by 30 students. (b) Repeat the exercise, using a different number of bins. Which is preferred? Why?